#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int i,j,n,x,Q[100005],l,v[100005],P[100005],cr,k;
int main()
{
    f>>n;
    for (i=1;i<=n;++i)
        {
            f>>x;v[i]=x;
            for (j=1;j<=l;++j)
                if (Q[j]>=x)
                    {
                        Q[j]=x;
                        P[++k]=j;
                    }
            if (j==l+1)
                {
                    Q[++l]=x;
                    P[++k]=l;
                }
        }
    g<<l<<'\n';
    cr=l;
    for (i=k;i;--i)
        {
            if (P[i]==cr)Q[cr]=v[i],--cr;
        }
    for (i=1;i<=l;++i)
        g<<Q[i]<<" ";

    return 0;
}